PROTOCOL TO THE CONVENTION ON DUTIES AND RIGHTS OF STATES IN THE EVENT OF CIVIL STRIFE

Opened for signature at the Pan-american
Union on May 1, 1957

The High Contracting Parties, desirous of clarifying,
supplementing, and strengthening the principles and rules stipulated in the Convention on
Duties and Rights of States in the Event of Civil Strife, signed at Havana on February 20,
1928,

Have resolved, in order to carry out those purposes, to
conclude the following Protocol:

Article 1

Each Contracting State shall, in areas subject to its
jurisdiction:

a) Keep under surveillance the traffic in arms and war
material that it has reason to believe is intended for starting, promoting, or supporting
civil strife in another American State;

b) Suspend the exportation or importation of any shipment
of arms and war material during the period of its investigation of the circumstances
relating to the shipment, when it has reason to believe that such arms and war material
may be intended for starting, promoting, or supporting civil strife in another American
State; and

c) Prohibit the exportation or importation of any shipment
of arms and war material intended for starting, promoting, or supporting civil strife in
another American State.

Article 2

The provision of Article 1 shall cease to be applicable
for a Contracting State only when it has recognized the belligerency of the rebels, in
which event the rules of neutrality shall be applied.

Article 3

The term "traffic in arms and war material",
which appears in the third paragraph of Article 1 of the Convention on Duties and Rights
of States in the Event of Civil Strife as well as in this Protocol, includes land
vehicles, vessels, and aircraft of all types, whether civil or military.
Article 4

The provisions of the Convention on Duties and Rights of
States in the Event of Civil Strife with respect to "vessels" are equally
applicable to aircraft of all types, whether civil or military.

Article 5

Each Contracting State shall, in areas subject to its
jurisdiction and within the powers granted by its Constitution, use all appropriate means
to prevent any person, national or alien, from deliberately participating in the
preparation, organization, or carrying out of a military enterprise that has as its
purpose the starting, promoting or supporting of civil strife in another Contracting
State, whether or not the government of the latter has been recognized.

For the purposes of this article, participation in the
preparation, organization, or carrying out of a military enterprise includes, among other
acts:

a) The contribution, supply or provision of arms and war
material;

b) The equipment, training, collection, or transportation
of members of a military expedition; or

c) The provision or receipt of money, by any method,
intended for the military enterprise.

Article 6

The present Protocol does not affect obligations
previously undertaken by the Contracting States through international agreements.

Article 7

This Protocol shall remain open in the Pan American Union
for signature by the American States, and shall be ratified in conformity with their
respective constitutional procedures.

Article 8

This Protocol may be ratified only by the States that have
ratified or ratify the Convention on the Duties and Rights of States in the Event of Civil
Strife. This Protocol shall enter into force between the States that ratify it, in
the order in which they deposit their respective instruments of ratification.

Article 9

The original instrument of this Protocol, the English, French, Portuguese, and Spanish
texts of which are equally authentic, shall be deposited with the Pan American Union,
which shall transmit certified copies thereof to the Governments for purposes of
ratification. The instruments of ratification shall be deposited with the Pan
American Union, which shall notify the signatory States of such deposit. A certified
copy of this Protocol shall be transmitted by the Pan American Union to the General
Secretariat of the United Nations for registration.

Article 10

This Protocol shall remain in force indefinitely between
the Contracting States. It may be denounced by any of them upon one year's
notice. Such denunciation shall be addressed to the Pan American Union, which shall
notify the other signatory States thereof.

Article 11

Each Contracting State shall refrain from denouncing the
Convention on Duties and Rights of States in the Event of Civil Strife while this Protocol
remains in force for that State.

IN WITNESS WHEREOF, the undersigned Plenipotentiaries,
whose full powers have been presented and found to be in good and due form, sign this
Protocol on the dates that appear opposite their respective signatures.